Locking device for folding doors.



J. J. KALIVODA. LOCKING DEVICE FOR FOLDING DOORS. APPLIUATION FILED111:0. 2s. 1911.

Patented 0111111912.

am? 11 em COLUMBIA PLANOL'IRAPH co WASHINGTON, D C.

JOSEF J. KALIVODA, OF CHICAGO, ILLINOIS.

LOCKING DEVICE FOR FOLDING DOORS.

Specification of Letters Patent.

Patented Oct. 1, 1912.

Application filed December 26, 1911. Serial No. 667,917.

To all whom it may concern.

Be it known that I, J osnr J. KALIVQDA, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Looking Devices forFolding Doors, of which the following'is a full, clear, concise, andexact description, reference being had to the accompanying drawings,forming a part of this specification.

My invention relates to an improvement in folding doors and has as itsparticular object the provision of a more cheap and simple arrangementfor latching said doors.

A further object is to avoid making noise in the operation of latchingmechanism for such doors.

A further object resides in the particular arrangement and combinationof parts here inafter described.

Referring to the accompanying drawings Figure 1 is an elevational view01 a pair of folding doors provided with my improved latching mechanism,part being broken away; Fig. 2 is a detail of the handle used inconnection with my latching mechanism, part being broken away; Fig. 3 isa side view of my improved ratchet plate used in connection with mylatching mechanism; Fig. 4: is a cross section on the line l l of Fig.3.

Throughout the separate views the same part is referred to by the samereference numeral.

Referring more particularly to the drawings, 1 and 2 are the two leavesof a common form of folding door constructed and mounted to open in themiddle. As shown the door is hung from rollers 3-3 traveling on asuitable track. The leaves 1 and 2 have a connecting lever mechanismwhich is well known in the art whereby as one leaf is pulled aside fromits central position, the other leaf is also moved through the samedistance. Such mechanism however, is well known in the art and is notshown or descrlbed hereln.

As indicated by the broken away portion of Fig. 1, the leaves of thedoor as shown are provided with a cover plate beneath which the latchingmechanism is mounted. Mounted on the one face of the leaf 2 is a plate 3on which is pivoted a handle 4. The

handle 4 is provided with a lug 5. The rod 6 lies beneath the plate 3and is provided the door.

at its upper end with a lug 7 which engages the upper face of the lug 5.The rod 6 extends from the handle vertically downward and at its lowerend is pivoted to a lever 8, which has at one end a lug or projection 9.

The lever 8 is pivoted in turn to the leaf 2 as shown at 10. At theright hand end of the lever 8 is a projection 11 which engages a socketin apivoted lever 12. Lever 12 at its right hand end is provided with alug or projection 13 for engaging with a ratchet plate 14 which has aplurality of teeth. Mounted on the leaf 1 is a pivoted lever 15 whichhas a lug or projection 16 engaging the upper face of the lug 9. At theleft end of the lever 15 is a projection 17 engaging in a lever 18 alsopivoted to the leaf 1. At the left of the lever 18 is a lug orprojection 19 for engaging with a stop 20. As shown in, the drawing, thelugs 9and 16 project into a groove in the floor beneath The members 1 1and 20 are to one side of this groove as shown, the latching lugsextending out from the face of the door. It will be obvious, however,that other relative arrangements of the levers and latch plates might beadopted.

In operating my device the person wishing to open the door pulls thehandle 4: to the right, thus lifting the rod 6 by means of the engaginglugs 5. and 7 Consequently the levers 8 and 15 will be lifted at one endand depressed at the other, thus lifting the outer ends of the levers 12and 18 and releasing the lugs 13 and 19 from their corresponding plates.

As shown more particularly in Figs. 3 and 4, the latch plate 14 isprovided with a plurality of ratchet teeth 21 for the purpose of holdingthe lug 13. In order to pre- 'vent a disagreeable noise when the lug 13drops into engagement between a pair of teeth, the lower face of theplate 14: is slotted and a block 22 of felt or similar material isinserted into the slot. As indicated in Fig. 3 this slot extends beyondthe bottom of the teeth 21, so that the lug 13 will fall against theblock 22 as at 24, and so will be prevented from making a noise.

It will be noted that latch plate 14: is provided with a plurality ofteeth whereas the plate 20 has only one. This is necessarily so becausethe lugs 9 and 16 disengage as soon as the leaves 1 and 2 have separateda short distance. The lever 15 consequently will be unsupported and thelug 19 will consaid devices, of said leaves for operating the latchingidevices of both leaves.

pair of leaves mounted to sequently drop. If the plate 20 were providedwith several teeth this would prevent the door from being furtheropened, since the lug 19 would catch on one of the teeth. The plate 1 1,however, has a plurality of teeth so that the door will be latched evenif it is only partially closed.

The construction shown and described herein is particularly well adaptedfor use in connection with elevator shaft doors but? obviously has manyother uses. E

It will be obvious that various rearrangements and modifications of myinvention may be made without departing from the spirit thereof, and Iwish it understood; that I contemplate all such changes andmodifications as are embraced within the scope of the appended claims.

What I claim is:

'1. In a folding door pair of leaves mounted to ing, a latching devicecarried on each of said leaves, stationary stop means mounted eX-;teriorly of said leaves, for cooperating with and mechanism carried onone in combination, a, separate on open- 2. In a folding door incombination, a

separate on opening, a lever provided with a latching lug; carried onone of said leaves, a second lever also having a latching lug mounted onthe; other of said leaves, a handle mounted on;

the first of said leaves and means for oper- 'ating both of said leversfrom said handle.

3. In a folding door in combination,

pair of leaves mounted to separate whenl openlng,

a lever mounted on one of said leaves provided with a lug projectingto-; ward the other of said leaves, a handle? mounted on said firstmentioned leaf, a vertical rod connecting said lever and said handle, alever mounted on said second mentioned leaf provided with a lugprojecting toward said first mentioned leaf, the lugs on said leversbeing in engagement when the door is closed.

4. In a folding door in combination, a pair of leaves mounted toseparate on opening, a lever mounted on one of said leaves, a handlemounted on the same leaf as said lever, a rod for transmitting motionfrom said handle to said lever, and a second lever mounted on the othersaid rod and said first mentioned lever being arranged to operate saidsecond mentioned lever.

5. In a folding door in combination, a pair of leaves mounted toseparate on opening, a lever mounted on one of said leaves provided witha lug projecting toward the other of said leaves, a handle mounted onsaid first mentioned leaf, a. vertical rod connecting said lever andsaid handle, a lever mounted 011 said second mentioned leaf providedwith a lug projecting toward said first mentioned leaf, the lugs on saidleaves overlapping when the door is closed, stops mounted eXteriorlyadditional lever mounted on each leaf for cooperating with said stops,said additional levers being operated by said previously mentionedlevers.

In witness whereof, I hereunto subscribe my name this 14th day ofDecember, A. D.,

J OSEF J. KALIVODA. Vitnesses A. LYDA JONES, A. S. DENNISON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

of said leaves,

